Remote input and output equipment for train

Abstract

The utility model relates to a remote input and output device for a train. The device is in communication connection with a TIMS system of the train. The device comprises a CPU module serving as a central control unit of the device; the relay output module and the signal input module are connected with the CPU module, the power supply module supplies power to each module of the equipment, and the power supply module comprises a fuse and a piezoresistor parallel to an input power supply. Compared with the prior art, the utility model has the advantages that the protection measures of the power supply module are added, so that the usability and the stability of the remote input / output equipment and the train TIMS system are improved, and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of train control, in particular to a remote input and output device for a train. Background Art

[0002] The TIMS (Train Information Management System) is a train information management system primarily used to monitor and control information from key onboard devices connected via serial transmission lines, monitor the operating status of these devices in real time, and transmit data over the network to ensure safe and efficient train operation. In the TIMS system, the train cab display screen often displays empty or / and dashed frames, making it impossible to monitor the operating status of onboard devices in real time, posing a potential safety hazard to train operations. In the TIMS system, the train cab display screen is controlled by remote input and output devices, so ensuring the stability and availability of these remote input and output devices is a critical issue that requires research.

[0003] How to achieve the stability and availability of remote input and output devices has become a technical problem that needs to be solved. Utility Model Content

[0004] The purpose of the present invention is to provide a remote input and output device for trains in order to overcome the defects of the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] According to one aspect of the utility model, a remote input and output device for a train is provided, which is communicatively connected to the TIMS system of the train and is characterized in that the device includes: a CPU module serving as the central control unit of the device; a relay output module and a signal input module connected to the CPU module, and a power supply module for supplying power to each module of the device; the power supply module includes a fuse and a varistor in parallel with the input power supply.

[0007] Preferably, the device further comprises an RS485 module for connecting to the TIMS system on-board equipment.

[0008] Preferably, the device further comprises a FIP module responsible for communicating with the upper-level MPU processing unit;

[0009] The FIP module is connected to the carriage of the TIMS system.

[0010] Preferably, the power supply module includes a first power supply module and a second power supply module.

[0011] More preferably, the second power supply module is connected to the relay output module and the signal input module respectively.

[0012] Preferably, the first power supply module is respectively connected to other modules except the relay output module, the second power supply module and the signal input module.

[0013] Preferably, the rated voltage of the fuse is 125V and the rated current is 2A.

[0014] Preferably, the DC rated voltage of the varistor is 140V, and the AC rated voltage is 180V.

[0015] Preferably, the rated current of the varistor is 10A.

[0016] Preferably, the varistor includes two varistors connected in parallel and having the same parameters.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1) The utility model is connected to the train's TIMS system for communication. Based on the collected status of the on-board equipment, the utility model implements control commands for the on-board equipment, sends them to the TIMS system, and then displays them on the display screen in the train cab to monitor the operating status of the on-board equipment. By adding fuses and varistors to the power module, the power module is protected against high currents and high voltages, thereby ensuring the safety and efficiency of the train operation.

[0019] 2) The utility model ensures the protection of other components and other modules when the current of the power module is too large by optimizing the parameters of the fuse, thereby improving the availability and stability of the equipment.

[0020] 3) The present invention reduces the impact of overvoltage on subsequent sensitive circuits by adding parallel redundant varistors, thereby improving the availability and stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the remote input and output device in the present utility model;

[0022] Figure 2 This is a schematic diagram of the principle of the power module protection part of the utility model;

[0023] 11 is the first power module, 12 is the second power module, 2 is the CPU module, 3 is the FIP module, 4 is the RS485 module, 5 is the relay output module, 6 is the signal input module, F1 is the fuse, RV1 and RV2 are varistors. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0025] This embodiment relates to a remote input and output device for a train, which is communicatively connected to the train's TIMS system and includes a power module 1, a CPU module 2, a FIP module 3, an RS485 module 4, a relay output module 5, and a signal input module 6.

[0026] The power module 1 includes two identical first power modules 11 and second power modules 12. The first power module 11 supplies power to the CPU module 2, the FIP module 3, and the RS485 module 4, while the second power module 12 supplies power to the relay output module 5 and the signal input module 6.

[0027] The CPU module 2 is connected to the FIP module 3 , the RS485 module 4 , the relay output module 5 and the signal input module 6 respectively. The FIP module 3 is also connected to the relay output module 5 .

[0028] The CPU module 2 is the central control unit of the device. It processes the information received from the signal input module 6 and outputs it to the train's TIMS system through the relay output module 5.

[0029] The FIP module 3 is connected to the carriage of the TIMS system, supports the bus of the WorldFIP protocol, and is responsible for communicating with the upper-level MPU processing unit.

[0030] RS485 module 4 is connected to the vehicle-mounted equipment of the TIMS system, including doors, air conditioners, and radios.

[0031] The relay output module 5 is used to output the control information of the vehicle-mounted equipment and the vehicle compartment after being processed by the CPU, such as opening and closing the car door, adjusting the air conditioning temperature, playing the broadcast, etc.

[0032] The signal input module 6 is used to collect status information of onboard equipment and carriages on the train.

[0033] The appearance of empty or dashed frames on the train cab display screen in the TIMS system indicates that the connected remote I / O device is malfunctioning. This malfunction can include network connection failures and remote I / O device failures, most often caused by a remote I / O device failure. During maintenance, it was discovered that a fault in the remote I / O device's power module caused the remote I / O device to stop functioning, resulting in the empty or dashed frames on the TIMS system's train cab display screen.

[0034] like Figure 2 This is a schematic diagram of the protection section of power module 1. The input power of power module 1 is DC110V, which is connected in parallel with the varistor and then protected by fuse F1. It is then connected to a dedicated socket CN1 for external power supply. The varistor includes two parallel varistors RV1 and RV2. RV1 and RV2 are redundant and have the same parameters. When the voltage exceeds the voltage threshold U N When the voltage is too high, the resistance of the varistor decreases, causing the current flowing through it to surge while the impact on the subsequent circuits does not change much, thereby reducing the impact of overvoltage on subsequent sensitive circuits.

[0035] The parameters of power module 1 are shown in Table 1.

[0036] Table 1

[0037] Specification symbol Numerical unit Minimum input DC voltage Vin, min 77 VDC Maximum input DC voltage Vin, max 137 VDC Switching frequency ±1% F 87 KHz Output voltage ±10% Vout 15 VAC Output current ±10% Iout 0.7 A Rated power ±10% P 20 W Operating temperature OT -20-85 ℃ Operating humidity ORH 0-90 %RH Rated load efficiency η 80 ％

[0038] According to the parameters of the power module in Table 1, calculate the parameters of the fuse F1 and the varistor.

[0039]

[0040] Among them, 0.9 is the power factor, P out is the output power, V in_dc_min is the minimum input voltage, η is the efficiency, I fuse is the rated current of the fuse.

[0041] According to the above formula, I fuse The current is 0.72A. Considering the capacitor charging during power-up, the actual current is 1.5-3 times the calculated value, or 0.72 x 3 = 2.16A, ultimately choosing 2.0A. Therefore, fuse F1 is selected with a rated voltage of 125V and a rated current of 2A. The recommended model is the American Littelfuse 0251.200MAT1L.

[0042] Varistors are used in AC circuits to determine U RMS The principle is: the peak value of the maximum continuous AC working voltage Not greater than the varistor voltage U NThe lower limit of the tolerance (±10%) can be expressed as follows:

[0043]

[0044] If the varistor is used in a DC circuit, determine U DC The principle is: the varistor is under DC voltage U DC The power consumption under the action of U RMS The power consumption under the action of U is roughly equal to or slightly less than that under the action of RMS The power consumption under the action of the principle is derived from the empirical formula:

[0045] U DC ≈1.3U RMS or U DC ≈0.83U N

[0046] The maximum input voltage is 137V DC, so the calculated U DC = 137V x 1.3 = 178.1V. Therefore, the parameters to consider when selecting a varistor are: rated voltage 140V AC, 180V DC, rated current 10A, maximum current 1200A for one repetition within 8 / 20μs, maximum current 500A for 15 repetitions within 8 / 20μs, released energy 10 joules, and maximum average power consumption 0.25W. A varistor from TDK, model B72207S0141K101, is recommended.

[0047] If the varistor is not properly selected, it will cause a large number of overheating and burn out other components.

[0048] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A remote input and output device for a train, the device being communicatively connected to the train's TIMS system, characterized in that: The device comprises: A CPU module (2) serving as the central control unit of the device; a relay output module (5) and a signal input module (6) connected to the CPU module (2), and a power supply module (1) for supplying power to each module of the device; A FIP module (3) responsible for communicating with the upper-level MPU processing unit; The FIP module (3) is connected to the carriage of the TIMS system; The power supply module (1) comprises a fuse and a varistor connected in parallel with the input power supply.

2. A remote input and output device for a train according to claim 1, characterized in that: The device also includes an RS485 module (4) for connecting to the TIMS system onboard equipment.

3. A remote input and output device for a train according to claim 1, characterized in that: The power module (1) comprises a first power module (11) and a second power module (12).

4. A remote input and output device for a train according to claim 3, characterized in that: The second power supply module (12) is connected to the relay output module (5) and the signal input module (6) respectively.

5. A remote input and output device for a train according to claim 3, characterized in that: The first power supply module (11) is respectively connected to other modules except the relay output module (5), the second power supply module (12) and the signal input module (6).

6. A remote input and output device for a train according to claim 5, characterized in that: The rated voltage of the fuse is 125V and the rated current is 2A.

7. A remote input and output device for a train according to claim 5, characterized in that: The DC rated voltage of the varistor is 140V, and the AC rated voltage is 180V.

8. The remote input and output device for a train according to claim 5, characterized in that: The rated current of the varistor is 10A.

9. The remote input and output device for a train according to claim 5, characterized in that: The varistor includes two varistors connected in parallel and having the same parameters.

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